fix(build): checkout branch when building component images.
fix(build): checkout branch when building component images.

ewiseblatt/spinnaker,skim1420/spinnaker,ewiseblatt/spinnaker,duftler/spinnaker,duftler/spinnaker,skim1420/spinnaker,spinnaker/spinnaker,spinnaker/spinnaker,skim1420/spinnaker,spinnaker/spinnaker,ewiseblatt/spinnaker,spinnaker/spinnaker,duftler/spinnaker,skim1420/spinnaker,duftler/spinnaker,ewiseblatt/spinnaker